CA2175611A1 - Socket joint for plastic pipes - Google Patents
Socket joint for plastic pipesInfo
- Publication number
- CA2175611A1 CA2175611A1 CA002175611A CA2175611A CA2175611A1 CA 2175611 A1 CA2175611 A1 CA 2175611A1 CA 002175611 A CA002175611 A CA 002175611A CA 2175611 A CA2175611 A CA 2175611A CA 2175611 A1 CA2175611 A1 CA 2175611A1
- Authority
- CA
- Canada
- Prior art keywords
- seals
- socket joint
- sealing unit
- socket
- joint according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S285/00—Pipe joints or couplings
- Y10S285/91—Gaskets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Joints Allowing Movement (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to a socket joint for plastic pipes, whereupon a spigot end (1a) of one (1) of the pipes to be connected is inserted in an expanded section (2a) of a socket (2), and an intermediate space (3) situated between the spigot end and the expanded section comprises a housing sealing unit (4) that extends along a considerable part of the length of said intermediate space and that comprises several circular flexible lip seals (6) on its outer and inner circumference. The outer and inner circumference of the sealing unit (4) also comprise several circular support seals (7) which have a substantially smaller compressibility especially in the radial direction than the lip seals (6).
Description
~ 2 1 7 ~ S 1 1 A socket joint for plastic pipes The invention relates to a socket joint for plastic pipes, whereupon a spigot end of one of the pipes to be connected is inserted in an expanded section of a socket, and an intermediate space situated between the spigot end and the expanded section comprises a housing sealing unit that extends along a considerable part of the length of said intermediate space and that comprises several circular flexible lip seals on its outer and inner circumference.
In a previously known socket joint for plastic pipes, a smooth plastic pipe is connected to a socket having an inner circumference with a recess comprising an O-ring seal of a circular cross-section, as disclosed for example in Finnish patent 66069. This simple manner of implementation is applicable for pipes subjected to great radial stresses only in cases where the ring rigidity of the pipe to be joined to the socket is sufficiently great. The spigot end of the pipe should be able to stand the surface pressure caused by a hard O-ring without being deformed.
In another known socket joint, a socket with a smooth inner surface encircles a ribbed pipe having a great ring rigidity characteristic of this type of pipes. The sealing is realized with one or several O-ring seals that are placed between the ribs. An example of this manner of joining is disclosed in DE-UM-86 19 356. The significant feature is typically a substantially higher profile height than in a smooth pipe having a corresponding ring rigidity.
Since the most costly element in piping systems is usually the pipe fittings, it would be preferable if pipes of several different types could be joined to the same pipe fitting or socket. However, there are problems related to using a socket intended for a certain type of pipe for joining a pipe of another type.
If the outer diameter of a ribbed pipe corresponds to the diameter of a smooth plastic pipe, the ribbed pipe can be joined to the socket of the smooth plastic pipe if the rubber seal of the socket is removed. The only problem with this joint is the threshold formed between the inner diameters due to the different profile heights.
Problems occur especially when a smooth pipe should be joined to a socket intended for ribbed pipes.
It is naturally possible to provide the socket of a ribbed pipe with a conventional sealing groove, but in such a case the inner diameter of the pipe fitting will be substantially smaller than the inner diameter of the pipe, causing thus problems at least in gravity flow in an underground sewage and drainage pipe.
These problems are marked especially when the pipe to be joined is a smooth multilayer pipe which comprises considerably softer foamed material between the inner and outer layers, whereupon the wall thickness of the pipe is greater than normally and the inner layer maintains its shape best when subjected to lateral stresses but the outer layer and the material situated in the middle is deformed more easily.
When such a pipe is joined to a conventional socket, it produces a threshold since the wall thickness and therefore the inner hole in conventional pipe fittings are designed according to homogenous material, i.e. they are thinner than in the foamed pipe. On the other hand, a joint with a ribbed pipe comprising an additional groove for a rubber ring, as disclosed in European patent 600 214, is also problematic since the profile height is not sufficient, i.e. there will be a threshold in the inner hole, but also because the O-ring '2175~1l would make the thin surface layer yield, thus leading to a decrease in the surface pressure and therefore to a risk of leakage in the long run.
German Utility Model 92 15 544.8 discloses a simple solid seal intended to be placed between a smooth pipe and a smooth inner surface of a socket. This seal is not applicable for the above-described purposes especially in pipe systems that are situated underground in the horizontal direction and that are subjected to great local radial stresses (caused by stones, for example), since the sealing effect of the seal is not sufficient under deformations. Solid seals are also problematic due to the extremely great insertion force they require. Since the axial strength in pipes with a light construction is about one third of the strength of a corresponding homogenous pipe, a great insertion force may cause the pipe to break when it is being forcibly inserted.
Such a socket sealing device is also known that is positioned between the above-described smooth surfaces and that comprises an elongated housing the inner and outer circumference of which contain several circular flexible lip seals that are made of the same flexible material as the housing frame. This sealing device is intended for uses with no significant radial or lateral stresses, for example for vertical pipelines of buildings. If this sealing device is used in underground horizontal pipelines, it compresses too much radially thus resulting in a side compression, whereupon the pipe to be joined is situated considerably off the centre in the socket, causing problems both for the sealing and for the evenness of the flow.
The purpose of the present invention is to avoid the above-described problems and to provide such a sealing in the socket joint concerned that a socket with a relatively light construction intended especially for ribbed pipes could also be used for joining light-construction pipes with a smooth surface without problems and additional costs.
This objective is achieved with a socket joint of the type mentioned at the beginning, characterized according to the invention in that the outer and inner circumference of the sealing unit also comprise several circular support seals which have a substantially smaller compressibility especially in the radial direction than the lip seals, and that the sealing unit with its seals is one integral piece.
The invention is based on the idea that in addition to lip seals, the sealing device is also provided with more solid seals the primary function of which is to prevent the seal from compressing too much, whereas the lip seals perform the actual sealing.
The primary advantage of the invention is that the field of use of light-construction, inexpensive socket joints that are actually intended for the joints of ribbed pipes can be considerably expanded, whereupon it is not necessary to separately design sockets, but only a new sealing unit, for the simple multilayer pipes that contain recycled plastic and that are used more and more at present.
In the following, the invention will be described in greater detail with reference to the accompanying drawing, in which Figure 1 is a cross-section of a socket joint according to the invention, Figure 2 shows separately the seal of Figure 1, Figures 3 to 6 show alternative embodiments of the sealing unit, and 2175~1 1 Figures 7 and 8 show a situation wherein the socket joint according to the invention is subjected to a radial stress.
Figure 1 is a cross-section of a socket joint according to the invention for plastic pipes, in which joint a spigot end la of one 1 of the pipes to be connected is inserted in an expanded section 2a of the socket 2, and an intermediate space 3 situated between the spigot end la and the expanded section comprises a housing sealing unit 4 extending along a considerable length, essentially the entire length, of the aforementioned intermediate space 3. The socket 2 may be situated either in a separate connecting piece or it may be formed in the other pipe to be joined with the pipe 1.
The sealing unit 4, which is shown most clearly in Figure 2, comprises a cylindrical frame section 5 the outer and inner circumference of which comprise several circular flexible lip seals 6 and several circular support seals 7 having substantially smaller compressibility especially in the radial direction than the lip seals 6. The actual sealing is primarily performed by the lip seals 6, whereas the main function of the support seals 7 is to prevent the lip seals 6 from compressing too much.
When the sealing unit 4 is of the type described above, the pipe 1 to be connected may be a multilayer pipe comprising, between an outer and inner casing la and lb made of harder plastic, a considerably softer foamed plastic material lc, and the socket 2 may be a conventional light-construction socket intended for ribbed pipes without the occurrence of any of the above-described sealing problems or side compressions with the problems of eccentricity. The pipe 1 to be connected may be for example a recycled STIS 8 pipe formed of 21 75~1 ~
polyethylene and the socket 2 may be made of polyvinyl chloride.
In the embodiment of Figures 1 and 2, both the lip and support seals 6 and 7 are situated preferably evenly spaced apart and the support seals 7 are positioned between every other lip seal 6. Further, the lip and support seals 6 and 7 positioned on the outer circumference are placed to substantially match the lip and support seals 6 and 7 provided on the inner circumference of the sealing unit.
In the embodiment concerned, the cross-section of the support seals 7 is substantially rectangular, whereas the lip seals 6 have a fin-like shape so that their cross-section tapers off sharply ending in a sharp tip. Further, the support seals 7 are lower than the lip seals 6 and their cross-sectional surface is greater than that of the lip seals. It is also preferable that the support seals 7 are harder than the lip seals 6.
Thus, when the hardness of the support seal 7 increases, its cross-sectional surface can be reduced, if necessary.
The material of the sealing unit 4 may be for example thermoplastic rubber. However, the support seals 7 and the lip seals 6 may also be made of different materials. The material may also be thermoplastic elastomer that can be extruded.
The end of the above-described sealing unit 4 situated further in the socket 2 also comprises a radially inwardly directed annular flange 8 the inner diameter of which corresponds substantially to the inner diameter of the pipe 1 to be connected, the flange keeping the sealing unit in place at the spigot end la of the pipe 1 to be connected during the insertion into the socket 2.
~175Sll Figures 3 to 6 show, only by way of example, some of the several alternative embodiments of the sealing unit of the socket joint according to the invention.
In the sealing unit 14 of Figure 3, the support seals 17 are positioned between every lip seal 6 and they are formed to be less solid than in the first embodiment.
In the sealing unit 24 of Figure 4 in turn, the shape of the support seals 27 differs from the above-described examples and approximates to a semi-circle.
The sealing unit can also be made slightly conical, as shown in Figure 4, which provides the advantage that the spigot end of the pipe to be inserted in the socket is easy to install at the beginning since the insertion force increases only gradually after the holding friction has already been overcome.
The sealing unit may also be similar to the sealing unit 34 of Figure 5, which extends to the outside of the socket and blocks the socket with its end section 34a. The end section 34a can be removed when a connecting pipe is placed in the socket.
The sealing unit may also be similar to the sealing unit 44 of Figure 6 comprising additional fittings. The end of the sealing unit comprises grip handles, a grip ring 44a or the like with which the sealing unit can be easily pulled over the spigot end of the pipe.
All the above-described sealing units are integral pieces, also in cases where the support and lip seals are made of different materials.
Figure 7 in turn illustrates a situation wherein all the other parts of the socket joint of Figure 1, except the outer surface of the socket, are subjected to a great radial stress F, whereupon the 2175SlI
socket joint retains its sealing capacity, however, due to the sealing arrangement according to the invention and keeps the pieces to be joined substantially coaxial.
This figure shows that the sealing unit 4 is preferably formed in such a way that the hard support seals 7 are positioned in places where the outer surface of the socket 2' concerned comprises for example ribs 2b' that strengthen the structure.
Figure 8 corresponds to Figure 7, except that in Figure 8 the ribs 2b'' are smaller and they are positioned more densely than in Figure 7.
It is clear for a person skilled in the art that the invention is not restricted to the above-described examples, but the details of the invention may vary within the scope of the appended claims.
In a previously known socket joint for plastic pipes, a smooth plastic pipe is connected to a socket having an inner circumference with a recess comprising an O-ring seal of a circular cross-section, as disclosed for example in Finnish patent 66069. This simple manner of implementation is applicable for pipes subjected to great radial stresses only in cases where the ring rigidity of the pipe to be joined to the socket is sufficiently great. The spigot end of the pipe should be able to stand the surface pressure caused by a hard O-ring without being deformed.
In another known socket joint, a socket with a smooth inner surface encircles a ribbed pipe having a great ring rigidity characteristic of this type of pipes. The sealing is realized with one or several O-ring seals that are placed between the ribs. An example of this manner of joining is disclosed in DE-UM-86 19 356. The significant feature is typically a substantially higher profile height than in a smooth pipe having a corresponding ring rigidity.
Since the most costly element in piping systems is usually the pipe fittings, it would be preferable if pipes of several different types could be joined to the same pipe fitting or socket. However, there are problems related to using a socket intended for a certain type of pipe for joining a pipe of another type.
If the outer diameter of a ribbed pipe corresponds to the diameter of a smooth plastic pipe, the ribbed pipe can be joined to the socket of the smooth plastic pipe if the rubber seal of the socket is removed. The only problem with this joint is the threshold formed between the inner diameters due to the different profile heights.
Problems occur especially when a smooth pipe should be joined to a socket intended for ribbed pipes.
It is naturally possible to provide the socket of a ribbed pipe with a conventional sealing groove, but in such a case the inner diameter of the pipe fitting will be substantially smaller than the inner diameter of the pipe, causing thus problems at least in gravity flow in an underground sewage and drainage pipe.
These problems are marked especially when the pipe to be joined is a smooth multilayer pipe which comprises considerably softer foamed material between the inner and outer layers, whereupon the wall thickness of the pipe is greater than normally and the inner layer maintains its shape best when subjected to lateral stresses but the outer layer and the material situated in the middle is deformed more easily.
When such a pipe is joined to a conventional socket, it produces a threshold since the wall thickness and therefore the inner hole in conventional pipe fittings are designed according to homogenous material, i.e. they are thinner than in the foamed pipe. On the other hand, a joint with a ribbed pipe comprising an additional groove for a rubber ring, as disclosed in European patent 600 214, is also problematic since the profile height is not sufficient, i.e. there will be a threshold in the inner hole, but also because the O-ring '2175~1l would make the thin surface layer yield, thus leading to a decrease in the surface pressure and therefore to a risk of leakage in the long run.
German Utility Model 92 15 544.8 discloses a simple solid seal intended to be placed between a smooth pipe and a smooth inner surface of a socket. This seal is not applicable for the above-described purposes especially in pipe systems that are situated underground in the horizontal direction and that are subjected to great local radial stresses (caused by stones, for example), since the sealing effect of the seal is not sufficient under deformations. Solid seals are also problematic due to the extremely great insertion force they require. Since the axial strength in pipes with a light construction is about one third of the strength of a corresponding homogenous pipe, a great insertion force may cause the pipe to break when it is being forcibly inserted.
Such a socket sealing device is also known that is positioned between the above-described smooth surfaces and that comprises an elongated housing the inner and outer circumference of which contain several circular flexible lip seals that are made of the same flexible material as the housing frame. This sealing device is intended for uses with no significant radial or lateral stresses, for example for vertical pipelines of buildings. If this sealing device is used in underground horizontal pipelines, it compresses too much radially thus resulting in a side compression, whereupon the pipe to be joined is situated considerably off the centre in the socket, causing problems both for the sealing and for the evenness of the flow.
The purpose of the present invention is to avoid the above-described problems and to provide such a sealing in the socket joint concerned that a socket with a relatively light construction intended especially for ribbed pipes could also be used for joining light-construction pipes with a smooth surface without problems and additional costs.
This objective is achieved with a socket joint of the type mentioned at the beginning, characterized according to the invention in that the outer and inner circumference of the sealing unit also comprise several circular support seals which have a substantially smaller compressibility especially in the radial direction than the lip seals, and that the sealing unit with its seals is one integral piece.
The invention is based on the idea that in addition to lip seals, the sealing device is also provided with more solid seals the primary function of which is to prevent the seal from compressing too much, whereas the lip seals perform the actual sealing.
The primary advantage of the invention is that the field of use of light-construction, inexpensive socket joints that are actually intended for the joints of ribbed pipes can be considerably expanded, whereupon it is not necessary to separately design sockets, but only a new sealing unit, for the simple multilayer pipes that contain recycled plastic and that are used more and more at present.
In the following, the invention will be described in greater detail with reference to the accompanying drawing, in which Figure 1 is a cross-section of a socket joint according to the invention, Figure 2 shows separately the seal of Figure 1, Figures 3 to 6 show alternative embodiments of the sealing unit, and 2175~1 1 Figures 7 and 8 show a situation wherein the socket joint according to the invention is subjected to a radial stress.
Figure 1 is a cross-section of a socket joint according to the invention for plastic pipes, in which joint a spigot end la of one 1 of the pipes to be connected is inserted in an expanded section 2a of the socket 2, and an intermediate space 3 situated between the spigot end la and the expanded section comprises a housing sealing unit 4 extending along a considerable length, essentially the entire length, of the aforementioned intermediate space 3. The socket 2 may be situated either in a separate connecting piece or it may be formed in the other pipe to be joined with the pipe 1.
The sealing unit 4, which is shown most clearly in Figure 2, comprises a cylindrical frame section 5 the outer and inner circumference of which comprise several circular flexible lip seals 6 and several circular support seals 7 having substantially smaller compressibility especially in the radial direction than the lip seals 6. The actual sealing is primarily performed by the lip seals 6, whereas the main function of the support seals 7 is to prevent the lip seals 6 from compressing too much.
When the sealing unit 4 is of the type described above, the pipe 1 to be connected may be a multilayer pipe comprising, between an outer and inner casing la and lb made of harder plastic, a considerably softer foamed plastic material lc, and the socket 2 may be a conventional light-construction socket intended for ribbed pipes without the occurrence of any of the above-described sealing problems or side compressions with the problems of eccentricity. The pipe 1 to be connected may be for example a recycled STIS 8 pipe formed of 21 75~1 ~
polyethylene and the socket 2 may be made of polyvinyl chloride.
In the embodiment of Figures 1 and 2, both the lip and support seals 6 and 7 are situated preferably evenly spaced apart and the support seals 7 are positioned between every other lip seal 6. Further, the lip and support seals 6 and 7 positioned on the outer circumference are placed to substantially match the lip and support seals 6 and 7 provided on the inner circumference of the sealing unit.
In the embodiment concerned, the cross-section of the support seals 7 is substantially rectangular, whereas the lip seals 6 have a fin-like shape so that their cross-section tapers off sharply ending in a sharp tip. Further, the support seals 7 are lower than the lip seals 6 and their cross-sectional surface is greater than that of the lip seals. It is also preferable that the support seals 7 are harder than the lip seals 6.
Thus, when the hardness of the support seal 7 increases, its cross-sectional surface can be reduced, if necessary.
The material of the sealing unit 4 may be for example thermoplastic rubber. However, the support seals 7 and the lip seals 6 may also be made of different materials. The material may also be thermoplastic elastomer that can be extruded.
The end of the above-described sealing unit 4 situated further in the socket 2 also comprises a radially inwardly directed annular flange 8 the inner diameter of which corresponds substantially to the inner diameter of the pipe 1 to be connected, the flange keeping the sealing unit in place at the spigot end la of the pipe 1 to be connected during the insertion into the socket 2.
~175Sll Figures 3 to 6 show, only by way of example, some of the several alternative embodiments of the sealing unit of the socket joint according to the invention.
In the sealing unit 14 of Figure 3, the support seals 17 are positioned between every lip seal 6 and they are formed to be less solid than in the first embodiment.
In the sealing unit 24 of Figure 4 in turn, the shape of the support seals 27 differs from the above-described examples and approximates to a semi-circle.
The sealing unit can also be made slightly conical, as shown in Figure 4, which provides the advantage that the spigot end of the pipe to be inserted in the socket is easy to install at the beginning since the insertion force increases only gradually after the holding friction has already been overcome.
The sealing unit may also be similar to the sealing unit 34 of Figure 5, which extends to the outside of the socket and blocks the socket with its end section 34a. The end section 34a can be removed when a connecting pipe is placed in the socket.
The sealing unit may also be similar to the sealing unit 44 of Figure 6 comprising additional fittings. The end of the sealing unit comprises grip handles, a grip ring 44a or the like with which the sealing unit can be easily pulled over the spigot end of the pipe.
All the above-described sealing units are integral pieces, also in cases where the support and lip seals are made of different materials.
Figure 7 in turn illustrates a situation wherein all the other parts of the socket joint of Figure 1, except the outer surface of the socket, are subjected to a great radial stress F, whereupon the 2175SlI
socket joint retains its sealing capacity, however, due to the sealing arrangement according to the invention and keeps the pieces to be joined substantially coaxial.
This figure shows that the sealing unit 4 is preferably formed in such a way that the hard support seals 7 are positioned in places where the outer surface of the socket 2' concerned comprises for example ribs 2b' that strengthen the structure.
Figure 8 corresponds to Figure 7, except that in Figure 8 the ribs 2b'' are smaller and they are positioned more densely than in Figure 7.
It is clear for a person skilled in the art that the invention is not restricted to the above-described examples, but the details of the invention may vary within the scope of the appended claims.
Claims (14)
1. A socket joint for plastic pipes, whereupon a spigot end of one of the pipes to be connected is inserted in an expanded section of a socket, and an intermediate space situated between the spigot end and the expanded section comprises a housing sealing unit that extends along a considerable part of the length of said intermediate space and that comprises several circular flexible lip seals on its outer and inner circumference, wherein the outer and inner circumference of the sealing unit also comprise several circular support seals which have a substantially smaller compressibility especially in the radial direction than the lip seals, and the sealing unit with its seals is one integral piece.
2. A socket joint according to claim 1, wherein both the lip and support seals are situated evenly spaced from one another.
3. A socket joint according to claim 1, wherein the support seals are placed between at least every other lip seal.
4. A socket joint according to claim 1, wherein the lip and support seals provided on the outer circumference of the sealing unit are arranged to substantially match the lip and support seals situated on the inner circumference of the sealing unit.
5. A socket joint according to claim 1, wherein the cross-sectional shape of the support seals is substantially rectangular, whereas the lip seals have a fin-like shape and their cross-section tapers off sharply ending in a sharp tip.
6. A socket joint according to claim 1, wherein the height of the support seals is smaller than that of the lip seals.
7. A socket joint according to claim 1, wherein the cross-sectional surface of the support seals is greater than that of the lip seals.
8. A socket joint according to claim 1, wherein the sealing unit is slightly conical.
9. A socket joint according to claim 1, wherein the hardness of the support seals is greater than that of the lip seals.
10. A socket joint according to claim 1, wherein the support seals and the lip seals are made of different materials.
11. A socket joint according to claim 1, wherein the sealing unit is provided with an end flange that is placed at the outer end of the unit, that blocks the unit, but that can be removed.
12. A socket joint according to claim 1, wherein the sealing unit comprises at its end grip handles, a grip ring or the like with which the sealing unit can be easily pulled over the spigot end of the pipe.
13. A socket joint according to claim 1, wherein the end of the sealing unit situated further in the socket comprises a radially inwardly directed annular flange that has an inner diameter corresponding substantially to the inner diameter of the pipe to be joined and that keeps the sealing unit in place at the spigot end of the pipe to be connected during the insertion in the socket.
14. A socket joint according to claim 1, wherein the pipe to be connected is a smooth multilayer pipe comprising, between the inner and outer layer, foamed and/or recycled material and having an inner diameter that corresponds substantially to the inner diameter of the non-expanded section of the socket.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI952378 | 1995-05-16 | ||
FI952378A FI101498B (en) | 1995-05-16 | 1995-05-16 | Sleeve connection for plastic pipes |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2175611A1 true CA2175611A1 (en) | 1996-11-17 |
Family
ID=8543426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002175611A Abandoned CA2175611A1 (en) | 1995-05-16 | 1996-05-02 | Socket joint for plastic pipes |
Country Status (8)
Country | Link |
---|---|
US (1) | US5653452A (en) |
EP (1) | EP0743482B1 (en) |
AT (1) | ATE182394T1 (en) |
AU (1) | AU703159B2 (en) |
CA (1) | CA2175611A1 (en) |
DE (1) | DE69603315T2 (en) |
ES (1) | ES2133890T3 (en) |
FI (1) | FI101498B (en) |
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US9970242B2 (en) | 2013-01-11 | 2018-05-15 | Tenaris Connections B.V. | Galling resistant drill pipe tool joint and corresponding drill pipe |
NL2010304C2 (en) | 2013-02-14 | 2014-08-18 | Beele Eng Bv | System for sealingly holding cables which extend through an opening. |
US9803256B2 (en) | 2013-03-14 | 2017-10-31 | Tenaris Coiled Tubes, Llc | High performance material for coiled tubing applications and the method of producing the same |
EP2789700A1 (en) | 2013-04-08 | 2014-10-15 | DALMINE S.p.A. | Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes |
EP2789701A1 (en) | 2013-04-08 | 2014-10-15 | DALMINE S.p.A. | High strength medium wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes |
KR102368928B1 (en) | 2013-06-25 | 2022-03-04 | 테나리스 커넥션즈 비.브이. | High-chromium heat-resistant steel |
US9989252B2 (en) * | 2013-08-22 | 2018-06-05 | Noritz Corporation | Exhaust adapter, exhaust structure for water heater, and method for installing exhaust adapter |
US9360140B2 (en) * | 2013-12-10 | 2016-06-07 | GM Global Technology Operations LLC | Sealing device for a vehicle |
US10302229B1 (en) * | 2015-11-17 | 2019-05-28 | Great Plains Industries, Inc. | Adjustable suction pipe assembly with improved pressure activated seal |
US11124852B2 (en) | 2016-08-12 | 2021-09-21 | Tenaris Coiled Tubes, Llc | Method and system for manufacturing coiled tubing |
US10434554B2 (en) | 2017-01-17 | 2019-10-08 | Forum Us, Inc. | Method of manufacturing a coiled tubing string |
DE102018202993A1 (en) * | 2018-02-28 | 2019-08-29 | Aktiebolaget Skf | warehouse |
USD906487S1 (en) | 2018-09-25 | 2020-12-29 | Megadyne Medical Products, Inc. | Universal connector |
US11141577B2 (en) * | 2018-09-25 | 2021-10-12 | Megadyne Medical Products, Inc. | Fluid system connector |
US11015749B2 (en) | 2018-09-25 | 2021-05-25 | Megadyne Medical Products, Inc. | Fluid system connector |
CN110388524A (en) * | 2019-07-27 | 2019-10-29 | 安徽埃夫利舍建筑技术有限公司 | A kind of double containment flexibility pipe connected pipe fitting |
US11692630B2 (en) * | 2020-04-21 | 2023-07-04 | Ford Global Technologies, Llc | Redundant seal with radial features |
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US2841429A (en) * | 1955-10-04 | 1958-07-01 | Parker Hannifin Corp | Sealing ring and joint |
US3052478A (en) * | 1959-09-16 | 1962-09-04 | Prec Associates Inc | Sealing ring |
DE1475807A1 (en) * | 1965-08-19 | 1969-09-18 | Ruehle Dipl Ing Alfred | Connection and sealing element for pipe connections |
DE1944832A1 (en) * | 1969-09-04 | 1971-03-11 | Muecher Hermann | Elastic sealing ring for pipe connection points |
CA992582A (en) * | 1972-10-31 | 1976-07-06 | George D. Kish | Pullout resistant pipe coupling member and gaskets therefor |
FR2234508A1 (en) * | 1973-06-21 | 1975-01-17 | Bertschmann Hans | Flexible joining seal for tulip ended pipe - has three unequal section rings connected by flexible membranes |
DE2800406C2 (en) * | 1978-01-05 | 1983-11-10 | Dipl.-Ing. Dr. Ernst Vogelsang Gmbh & Co Kg, 4352 Herten | Pipe connector |
NL177516C (en) * | 1978-09-12 | 1985-10-01 | Pidou Bv | SEALING CUFF. |
DK230180A (en) * | 1980-05-28 | 1981-11-29 | Schionning & Arve As | SEALING RING OF ELASTIC MATERIAL |
DE3506104A1 (en) * | 1985-02-18 | 1986-08-28 | Wegner & Co Schweißwerk-Behälterbau, 1000 Berlin | SLEEVE INTERNAL SEAL FOR PIPE JOINT |
NL8801130A (en) * | 1988-04-29 | 1989-11-16 | Wavin Bv | Elastomer pipe-joint sleeve - has integral external stiffening ribs level with inside stop edge at inner end |
DE3906967C1 (en) * | 1989-03-04 | 1990-10-25 | Friedrichsfeld Gmbh Keramik- Und Kunststoffwerke, 6800 Mannheim, De | |
DE9215544U1 (en) * | 1992-11-14 | 1993-03-11 | Gebrueder Ostendorf Kunststoffe Gmbh & Co. Kg, 2848 Vechta, De | |
SE515100C2 (en) * | 1994-06-08 | 2001-06-11 | Forsheda Ab | Device for sealing a gap |
-
1995
- 1995-05-16 FI FI952378A patent/FI101498B/en not_active IP Right Cessation
-
1996
- 1996-04-27 DE DE69603315T patent/DE69603315T2/en not_active Expired - Fee Related
- 1996-04-27 EP EP96201159A patent/EP0743482B1/en not_active Expired - Lifetime
- 1996-04-27 AT AT96201159T patent/ATE182394T1/en active
- 1996-04-27 ES ES96201159T patent/ES2133890T3/en not_active Expired - Lifetime
- 1996-05-01 US US08/641,481 patent/US5653452A/en not_active Expired - Fee Related
- 1996-05-02 CA CA002175611A patent/CA2175611A1/en not_active Abandoned
- 1996-05-14 AU AU52241/96A patent/AU703159B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
AU703159B2 (en) | 1999-03-18 |
EP0743482B1 (en) | 1999-07-21 |
DE69603315D1 (en) | 1999-08-26 |
DE69603315T2 (en) | 2000-02-10 |
AU5224196A (en) | 1996-11-28 |
FI101498B1 (en) | 1998-06-30 |
ES2133890T3 (en) | 1999-09-16 |
EP0743482A2 (en) | 1996-11-20 |
EP0743482A3 (en) | 1996-12-18 |
FI101498B (en) | 1998-06-30 |
US5653452A (en) | 1997-08-05 |
FI952378A0 (en) | 1995-05-16 |
FI952378A (en) | 1996-11-17 |
ATE182394T1 (en) | 1999-08-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Discontinued |